A PERFECT CIRCLE DRAWN BY LIGHT, NOT IMAGINATION


 A PERFECT CIRCLE DRAWN BY LIGHT, NOT IMAGINATION.

As moonlight passes through thin, ice-rich clouds high in the atmosphere, millions of tiny hexagonal crystals bend and scatter the light at a fixed angle. The result is a rare lunar halo — a full ring centered precisely on the Moon. Its colors appear because different wavelengths refract by slightly different amounts, revealing the hidden structure of light itself. For a short moment, geometry, altitude, and temperature align, allowing the night sky to display the quiet precision of atmospheric physics.

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